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Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2015

Goodwill and Intangible Assets

Schedule of changes in goodwill

				Gross carrying					Accumulated
				amount					impairment					Net amount
				(in thousands)
Balance at December 31, 2013				$	186,589				$	95,241				$	91,348
Acquisition				51,396					—					51,396
Purchase price adjustments				173					—					173
Impairments				—					27,958					(27,958		)

Balance at December 31, 2014				238,158					123,199					114,959
Purchase price adjustments				(51		)			—					(51		)

Balance at December 31, 2015				$	238,107				$	123,199				$	114,908

Schedule of intangible assets

						December 31, 2015															December 31, 2014
		Weighted									Accumulated															Accumulated
		Average Remaining				Gross					Amortization										Gross					Amortization
		Amortization				Carrying					and					Net					Carrying					and					Net
		Period				Amount					Impairment					Amount					Amount					Impairment					Amount
		(in years)				(in thousands)
Technology		8.7				$	222,358				$	120,496				$	101,862				$	222,358				$	106,342				$	116,016
Customer relationships		12.9				47,885					22,470					25,415					69,350					35,549					33,801
Trademarks and tradenames		5.3				2,730					1,937					793					3,050					1,096					1,954
Indefinite-lived trademark		—				2,900					—					2,900					2,900					—					2,900
IPR&D		—				—					—					—					5,070					5,070					—
Other		1.8				6,241					5,537					704					5,485					848					4,637

Total		9.4				$	282,114				$	150,440				$	131,674				$	308,213				$	148,905				$	159,308

Schedule of estimated aggregate amortization expense for intangible assets with definite useful lives

				Amortization
				(in thousands)
2016				$	20,816
2017				17,976
2018				16,399
2019				15,165
2020				14,112
Thereafter				44,306

Total				$	128,774